Sash latch



Dec. 9., 1930' J.F.LEVAN SASH LATCH Filed March 11, 1927 2 Sheets-Sheet 1 Dec. 9, 1930. J. F. LEVAN ,147

SASH LATCH I Filed Mar ch 11, 1927 2 Sheets-Sheet 2 1720677157; \757271 FLeUan.

Patented Dec. 9,

UNITED STATES PATENT OFFICE JOHN F. 'LEVAN, OF ELKHABT, INDIANA, ASSIGNOR TO THE ADAMS & WESTLAKE COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS sAsH LATCH Application 111m March 11, 1927. Serial No. 174,510.

The purpose of the present invention is to provide an improved latch for use in connection with metal sash.

The latch of the invention is characterized by several features of improvement, one being the way in which the bolt is slidably mounted in spaced relation to the sides of the guideway, another being the way in which the sash is reinforced at a point above the nose of the bolt, and still another being the way in which the bolt is connected with the operating finger piece. Other novel features will be evident upon a full understanding of the construction of the latch.

For the purpose of exemplification, one form of the invention is presented herein. It will be appreciated, however, that the invention is susceptible of embodiment in other forms coming equally within the scope of the appended claims.

In the accompanying drawings:

Fig. 1 is a side view of a corner of a sash equipped with a lock constructedin accordance with the invention;

Fig. 2 is a horizontal section, taken on the line 2-2 of Fig. 1;

Fig. 3 is a vertical section, taken on the line 33 of Fig. 2;

Fig. 4 is a vertical section, taken on the line 44 of Fig. 2:

F 5 is a vertical section, taken on the line 55 of Fig. 1;

Fig. 6 is a vertical section, taken on the line 66 of Fig. 1;

Fig. 7 is a horizontal section, taken on the line 77 of Fig. 1; and

Fig. 8 is a perspective view of the bolt.

The latch is shown in association with a metal sash having tubular stile and rail members 10 and 11. The latch consists of a bolt 12 which is slidably mounted within the lower rail member of the sash, a plate 13 which is secured to the side of the sash in a position overlying the junction between the rail and stile members, and a finger piece 14 which is pivotally mounted within the plate and is operatively connected with the bolt through an aperture 15 in the side of the rail member.

The structure forming the slideway for the bolt within the rail member (see Figs. 4 and 5) consists of a deep channel member 16, and a shallow channel member 17 of substantially the same length seated within the member 16 in inverted relation thereto. the bolt slides upon the back 18 of the member 17, while the sides of the bolt are maintained in spaced relation to the sides of the member 16 above the member 17 by small bearing lugs 19 on the sides of the bolt (see Fig. 8) which contact with the sides of the member 16. The top of the bolt slides against the inner surface of the top of the rail member, and the nose of the bolt, upon which the weight of the sash rests when in an elevated and latched position, is prevented from beingforced up wardly in the sash under such weight by a cross member 20 which is rigidly positioned between two upwardly projecting portions 21 of the channel member 16 in the stile member.

The operating connection between the bolt and p the finger piece consists of a pin 22 which extends from the finger piece laterally through the aperture 15 in therail member, 'and into a vertically elongated slot 23 cutv laterally through the top of the bolt. The pin 22 is secured to the finger piece at a point spaced from the pivotal axis 24 thereof, and

the contour of the'sash. The finger piece.

is depressible against the action of a spring 25 housed within the plate, which spring engages beneath a grooved shoulder portion 26 on the finger piece. The spring of course serves to project the nose of the bolt from the sash into a position for engagement with a latch rack whenever the finger piece is released.

' The plate is provided with a stationary lift piece 27 at a convenient point beneath the finger piece 14, and is secured to the corner of ,the sash in readily detachable relation thereto by means of a number of screws. Two of the screws, 28 and 29, are of telescopic two-part construction and extend entirely through the sash. The other screws, 30 and 31, extend only far enough into the The bottom oi ion sash to efiect secure engagement with the same.

From the foregoing description, it will be appreciated that the two nested channel members 16 and 17 provide the sides and bottom of an easily constructed, inexpensive and effective slideway for the belt, that the spacing projections 22 on the sides of the bolt greatly reduce the friction which would otherwise be set upby the bolt in being moved, and also prevent the bolt from binding within the slideway due to the presence of any foreign matter at the sides of the same, that the cross member 20 above the nose of the bolt prevents the nose from being forced up into the sash under the weight of the latter, and that the pin-andslot connection between the slidably mounted bolt and pivotally mounted finger piece atfords a positive yet readily detachable association therebetween.

Certain of the novel features claimed herein are disclosed but not claimed in my copending application Serial No. 110,894 which on August 2, 1927 issued as Patent No. 1,637,865.

I claim:

1. The combination with a metal sash, of a slideway in one of the marginal members of the sash, a relatively narrow bolt in the slideway, and projections on both sides of the bolt in contact with the sides of the slide way for centering the bolt in the slideway in spaced relation to the sides of the latter.

2. The combination with a metal sash, of a slideway in the lower rail thereof, a bolt in the slideway, and a cross member having greater resistance to stress than adjacent portions of the slideway which constitutes a portion of the slideway and is located above the nose of the bolt for preventing the nose from moving upwardly when the weight of the sash is resting upon the same.

3. In a metal sash, a. deep upwardly opening channel member fitted within the lower rail of the sash, a shallow downwardly opening channel member nested within the deep member, and a bolt slidably mounted on the back of the shallow member between the sides of the deep member.

4. In a metal sash, an upwardly opening channel member fitted within the lower rail of the sash, a bolt slidably mounted between the sides of the channel member, and a cross member rigidly secured between the sides of the channel at a point just above the nose of the bolt for preventing the nose from moving upwardly when the weight of the sash is resting upon the same.

5. In a metal sash, a deep upwardly opening channel member fitted within the lower rail of the sash and having two projections extending upwardly into the stile, a shallow downwardly opening channel member nested within the deep member, a bolt slidably mounted on the back of the shallow member between the sides of the deep member, and a cross member rigidly secured between the projections at a point just above the nose of the bolt in sliding contact with the same for preventing the nose from moving upwardly when the weight of the sash is resting upon the same.

6. The combination with a lower metal sash rail having an aperture in one side thereof, of a bolt slidably mounted within the rail and having a vertically extending slot therein, a plate secured against the outside of the rail, and a finger piece pivotally mounted on the plate and having a laterally extended pin eccentric to the pivotal axis which passes through the aperture in the rail into the slot in the bolt for reciprocating the latter upon oscillation of the finger piece, said bolt being withdrawable from the rail ulpon lateral separation of the pin from the s 0t.

In testimony whereof I have hereunto subscribed my name.

JOHN F. LEVAN. 

